Lamp Driver. HV825 Datasheet

HV825 Driver. Datasheet pdf. Equivalent

Part HV825
Description High Voltage EL Lamp Driver
Feature Supertex inc. HV825 High Voltage EL Lamp Driver IC Features ►► Processed with HVCMOS® technology .
Manufacture Supertex Inc
Datasheet
Download HV825 Datasheet



HV825
Supertex inc.
HV825
High Voltage
EL Lamp Driver IC
Features
Processed with HVCMOS® technology
1.0 to 1.6V operating supply voltage
DC to AC conversion
Output load of typically up to 6.0nF
Adjustable output lamp frequency
Adjustable converter frequency
Enable function
Applications
Pagers
Portable transceivers
Cellular phones
Remote control units
Calculators
General Description
The Supertex HV825 is a high voltage driver designed for driv-
ing EL lamps typically up to 6.0nF. The input supply voltage range
is from 1.0V to 1.6V. The device uses a single inductor and a
minimum number of passive components. The typical output
voltage that can be applied to the EL lamp is ±56V.
The HV825 can be enabled/disabled by connecting the RSW-Osc resistor
to VDD/GND.
The HV825 has two internal oscillators, a switching bipolar junction transistor
(BJT), and a high voltage EL lamp driver. The frequency for the switching
BJT is set by an external resistor connected between the RSW-Osc pin and
the VDD supply pin. The EL lamp driver frequency is set by an external
resistor connected between REL-Osc pin and the VDD pin. An external
inductor is connected between the LX and VDD pins. A 0.01 to 0.1µF,
100V capacitor is connected between the CS pin and the GND pin. The
EL lamp is connected between the VA pin and the VB pin.
The switching BJT charges the external inductor and discharges it into the
0.01 to 0.1µF, 100V capacitor at the CS pin. The voltage at the CS pin will
start to increase. The outputs VA and VB are configured as an H-bridge
and are switching in opposite states to achieve a peak-to-peak voltage of
two times the VCS voltage across the EL lamp.
For additional information, see Application Notes AN-H33 and AN-
H34.
Block Diagram
VDD
RSW-Osc
GND
Switch
Osc
REL-Osc
Q
Q
Output
Osc
Q
Q
LX
CS
VA
VB
Doc.# DSFP-HV825
C072913
Supertex inc.
www.supertex.com



HV825
HV825
Ordering Information
Pin Configuration
Part Number
Package
Packing
VDD 1
8 REL-Osc
HV833LG-G
8-Lead SOIC
HV833MG-G
8-Lead MSOP
-G denotes a lead (Pb)-free / RoHS compliant package
2500/Reel
2500/Reel
RSW-Osc 2
CS 3
7 VA
6 VB
LX 4
5 GND
Absolute Maximum Ratings
8-Lead SOIC / 8-Lead MSOP
Parameter
Value
Supply voltage, VDD
Operating Temperature Range
0.5V to +2.5V
-25°C to +85°C
Storage Temperature Range
-65°C to +150°C
MSOP-8 Power Dissipation
300mW
SO-8 Power Dissipation
400mW
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these conditions is not implied. Continuous operation
of the device at the absolute rating level may affect device reliability. All voltages are
referenced to device ground.
Typical Thermal Resistance
Package
θja
8-Lead SOIC
101OC/W
Product Marking
YWW
HV825
LLLL
Y = Last Digit of Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Package may or may not include the following marks: Si or
8-Lead SOIC
Top Marking
H825
LLLL
L = Lot Number
YY = Year Sealed
Bottom Marking WW = Week Sealed
YYWW
= “Green” Packaging
8-Lead MSOP
216OC/W
Package may or may not include the following marks: Si or
Electrical Characteristics
8-Lead MSOP
DC Characteristics (Over recommended operating conditions unless otherwise specified - TA = 25°C)
Sym Parameter
Min Typ Max Units Conditions
RDS(ON)
IIN
IDDQ
VCS
VA-B
fEL
fSW
D
On-resistance of switching transistor
VDD supply current (including inductor current)
Quiescent VDD supply current
Output voltage on VCS
Differential output voltage across lamp
VA-B output drive frequency
Switching transistor frequency
Switching transistor duty cycle
- - 15 Ω I = 50mA
- 30 38 mA VDD= 1.5V. See test circuit
- - 1.0 μA RSW-osc = GND
52 56 62 V VDD = 1.5V. See test circuit
104 112 124 V VDD = 1.5V. See test circuit
400 - - Hz VDD = 1.5V. See test circuit
- 30 - KHz VDD = 1.5V. See test circuit
- 88 - % ---
Recommended Operating Conditions
VDD Supply voltage
CL Load Capacitance
TA Operating temperature
Enable/Disable Table
VIL Low level input voltage to RSW-osc resistor
VIH High level input voltage to RSW-osc resistor
1.0 - 1.6 V ---
0 6.0 - nF ---
-25 - +85 OC ---
0
VDD-0.5
-
-
0.2 V VDD = 1.0 - 1.6V
VDD V VDD = 1.0 - 1.6V
Doc.# DSFP-HV825
C072913
Supertex inc.
2 www.supertex.com







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